I'm on step 16 out of 19 for Shadowkeep. The game is telling me to do the legacy campaign mission: "Beyond" on the moon. The "Lectern of Enchantment" is not letting me pick up the Nightmare Essence of Anguish so I can get the Dreambane Boots for the final piece of the set for the campaign mission. Why can't I pick it up when I have Phantasmal Cores? It's telling me you can only hold one at a time and I don't have any other Nightmare Essence at the moment. I cannot pick up any other Nightmare Essence also. Any help or advice?